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[PATCH] Represent laptop_mode as jiffies internally
[linux-2.6/verdex.git] / drivers / isdn / hisax / elsa_ser.c
blob898ec0916195a9b788a4679fad5bbd3b8fe50015
1 /* $Id: elsa_ser.c,v 2.14.2.3 2004/02/11 13:21:33 keil Exp $
2 *
3 * stuff for the serial modem on ELSA cards
4 *
5 * This software may be used and distributed according to the terms
6 * of the GNU General Public License, incorporated herein by reference.
7 *
8 */
9
10 #include <linux/config.h>
11 #include <linux/serial.h>
12 #include <linux/serial_reg.h>
13
14 #define MAX_MODEM_BUF 256
15 #define WAKEUP_CHARS (MAX_MODEM_BUF/2)
16 #define RS_ISR_PASS_LIMIT 256
17 #define BASE_BAUD ( 1843200 / 16 )
18
19 //#define SERIAL_DEBUG_OPEN 1
20 //#define SERIAL_DEBUG_INTR 1
21 //#define SERIAL_DEBUG_FLOW 1
22 #undef SERIAL_DEBUG_OPEN
23 #undef SERIAL_DEBUG_INTR
24 #undef SERIAL_DEBUG_FLOW
25 #undef SERIAL_DEBUG_REG
26 //#define SERIAL_DEBUG_REG 1
27
28 #ifdef SERIAL_DEBUG_REG
29 static u_char deb[32];
30 const char *ModemIn[] = {"RBR","IER","IIR","LCR","MCR","LSR","MSR","SCR"};
31 const char *ModemOut[] = {"THR","IER","FCR","LCR","MCR","LSR","MSR","SCR"};
32 #endif
33
34 static char *MInit_1 = "AT&F&C1E0&D2\r\0";
35 static char *MInit_2 = "ATL2M1S64=13\r\0";
36 static char *MInit_3 = "AT+FCLASS=0\r\0";
37 static char *MInit_4 = "ATV1S2=128X1\r\0";
38 static char *MInit_5 = "AT\\V8\\N3\r\0";
39 static char *MInit_6 = "ATL0M0&G0%E1\r\0";
40 static char *MInit_7 = "AT%L1%M0%C3\r\0";
41
42 static char *MInit_speed28800 = "AT%G0%B28800\r\0";
43
44 static char *MInit_dialout = "ATs7=60 x1 d\r\0";
45 static char *MInit_dialin = "ATs7=60 x1 a\r\0";
46
47
48 static inline unsigned int serial_in(struct IsdnCardState *cs, int offset)
49 {
50 #ifdef SERIAL_DEBUG_REG
51 u_int val = inb(cs->hw.elsa.base + 8 + offset);
52 debugl1(cs,"in %s %02x",ModemIn[offset], val);
53 return(val);
54 #else
55 return inb(cs->hw.elsa.base + 8 + offset);
56 #endif
57 }
58
59 static inline unsigned int serial_inp(struct IsdnCardState *cs, int offset)
60 {
61 #ifdef SERIAL_DEBUG_REG
62 #ifdef CONFIG_SERIAL_NOPAUSE_IO
63 u_int val = inb(cs->hw.elsa.base + 8 + offset);
64 debugl1(cs,"inp %s %02x",ModemIn[offset], val);
65 #else
66 u_int val = inb_p(cs->hw.elsa.base + 8 + offset);
67 debugl1(cs,"inP %s %02x",ModemIn[offset], val);
68 #endif
69 return(val);
70 #else
71 #ifdef CONFIG_SERIAL_NOPAUSE_IO
72 return inb(cs->hw.elsa.base + 8 + offset);
73 #else
74 return inb_p(cs->hw.elsa.base + 8 + offset);
75 #endif
76 #endif
77 }
78
79 static inline void serial_out(struct IsdnCardState *cs, int offset, int value)
80 {
81 #ifdef SERIAL_DEBUG_REG
82 debugl1(cs,"out %s %02x",ModemOut[offset], value);
83 #endif
84 outb(value, cs->hw.elsa.base + 8 + offset);
85 }
86
87 static inline void serial_outp(struct IsdnCardState *cs, int offset,
88 int value)
89 {
90 #ifdef SERIAL_DEBUG_REG
91 #ifdef CONFIG_SERIAL_NOPAUSE_IO
92 debugl1(cs,"outp %s %02x",ModemOut[offset], value);
93 #else
94 debugl1(cs,"outP %s %02x",ModemOut[offset], value);
95 #endif
96 #endif
97 #ifdef CONFIG_SERIAL_NOPAUSE_IO
98 outb(value, cs->hw.elsa.base + 8 + offset);
99 #else
100 outb_p(value, cs->hw.elsa.base + 8 + offset);
101 #endif
102 }
103
104 /*
105 * This routine is called to set the UART divisor registers to match
106 * the specified baud rate for a serial port.
107 */
108 static void change_speed(struct IsdnCardState *cs, int baud)
109 {
110 int quot = 0, baud_base;
111 unsigned cval, fcr = 0;
112 int bits;
113
114
115 /* byte size and parity */
116 cval = 0x03; bits = 10;
117 /* Determine divisor based on baud rate */
118 baud_base = BASE_BAUD;
119 quot = baud_base / baud;
120 /* If the quotient is ever zero, default to 9600 bps */
121 if (!quot)
122 quot = baud_base / 9600;
123
124 /* Set up FIFO's */
125 if ((baud_base / quot) < 2400)
126 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
127 else
128 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
129 serial_outp(cs, UART_FCR, fcr);
130 /* CTS flow control flag and modem status interrupts */
131 cs->hw.elsa.IER &= ~UART_IER_MSI;
132 cs->hw.elsa.IER |= UART_IER_MSI;
133 serial_outp(cs, UART_IER, cs->hw.elsa.IER);
134
135 debugl1(cs,"modem quot=0x%x", quot);
136 serial_outp(cs, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
137 serial_outp(cs, UART_DLL, quot & 0xff); /* LS of divisor */
138 serial_outp(cs, UART_DLM, quot >> 8); /* MS of divisor */
139 serial_outp(cs, UART_LCR, cval); /* reset DLAB */
140 serial_inp(cs, UART_RX);
141 }
142
143 static int mstartup(struct IsdnCardState *cs)
144 {
145 int retval=0;
146
147 /*
148 * Clear the FIFO buffers and disable them
149 * (they will be reenabled in change_speed())
150 */
151 serial_outp(cs, UART_FCR, (UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT));
152
153 /*
154 * At this point there's no way the LSR could still be 0xFF;
155 * if it is, then bail out, because there's likely no UART
156 * here.
157 */
158 if (serial_inp(cs, UART_LSR) == 0xff) {
159 retval = -ENODEV;
160 goto errout;
161 }
162
163 /*
164 * Clear the interrupt registers.
165 */
166 (void) serial_inp(cs, UART_RX);
167 (void) serial_inp(cs, UART_IIR);
168 (void) serial_inp(cs, UART_MSR);
169
170 /*
171 * Now, initialize the UART
172 */
173 serial_outp(cs, UART_LCR, UART_LCR_WLEN8); /* reset DLAB */
174
175 cs->hw.elsa.MCR = 0;
176 cs->hw.elsa.MCR = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
177 serial_outp(cs, UART_MCR, cs->hw.elsa.MCR);
178
179 /*
180 * Finally, enable interrupts
181 */
182 cs->hw.elsa.IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
183 serial_outp(cs, UART_IER, cs->hw.elsa.IER); /* enable interrupts */
184
185 /*
186 * And clear the interrupt registers again for luck.
187 */
188 (void)serial_inp(cs, UART_LSR);
189 (void)serial_inp(cs, UART_RX);
190 (void)serial_inp(cs, UART_IIR);
191 (void)serial_inp(cs, UART_MSR);
192
193 cs->hw.elsa.transcnt = cs->hw.elsa.transp = 0;
194 cs->hw.elsa.rcvcnt = cs->hw.elsa.rcvp =0;
195
196 /*
197 * and set the speed of the serial port
198 */
199 change_speed(cs, BASE_BAUD);
200 cs->hw.elsa.MFlag = 1;
201 errout:
202 return retval;
203 }
204
205 /*
206 * This routine will shutdown a serial port; interrupts are disabled, and
207 * DTR is dropped if the hangup on close termio flag is on.
208 */
209 static void mshutdown(struct IsdnCardState *cs)
210 {
211
212 #ifdef SERIAL_DEBUG_OPEN
213 printk(KERN_DEBUG"Shutting down serial ....");
214 #endif
215
216 /*
217 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
218 * here so the queue might never be waken up
219 */
220
221 cs->hw.elsa.IER = 0;
222 serial_outp(cs, UART_IER, 0x00); /* disable all intrs */
223 cs->hw.elsa.MCR &= ~UART_MCR_OUT2;
224
225 /* disable break condition */
226 serial_outp(cs, UART_LCR, serial_inp(cs, UART_LCR) & ~UART_LCR_SBC);
227
228 cs->hw.elsa.MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
229 serial_outp(cs, UART_MCR, cs->hw.elsa.MCR);
230
231 /* disable FIFO's */
232 serial_outp(cs, UART_FCR, (UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT));
233 serial_inp(cs, UART_RX); /* read data port to reset things */
234
235 #ifdef SERIAL_DEBUG_OPEN
236 printk(" done\n");
237 #endif
238 }
239
240 static inline int
241 write_modem(struct BCState *bcs) {
242 int ret=0;
243 struct IsdnCardState *cs = bcs->cs;
244 int count, len, fp;
245
246 if (!bcs->tx_skb)
247 return 0;
248 if (bcs->tx_skb->len <= 0)
249 return 0;
250 len = bcs->tx_skb->len;
251 if (len > MAX_MODEM_BUF - cs->hw.elsa.transcnt)
252 len = MAX_MODEM_BUF - cs->hw.elsa.transcnt;
253 fp = cs->hw.elsa.transcnt + cs->hw.elsa.transp;
254 fp &= (MAX_MODEM_BUF -1);
255 count = len;
256 if (count > MAX_MODEM_BUF - fp) {
257 count = MAX_MODEM_BUF - fp;
258 memcpy(cs->hw.elsa.transbuf + fp, bcs->tx_skb->data, count);
259 skb_pull(bcs->tx_skb, count);
260 cs->hw.elsa.transcnt += count;
261 ret = count;
262 count = len - count;
263 fp = 0;
264 }
265 memcpy((cs->hw.elsa.transbuf + fp), bcs->tx_skb->data, count);
266 skb_pull(bcs->tx_skb, count);
267 cs->hw.elsa.transcnt += count;
268 ret += count;
269
270 if (cs->hw.elsa.transcnt &&
271 !(cs->hw.elsa.IER & UART_IER_THRI)) {
272 cs->hw.elsa.IER |= UART_IER_THRI;
273 serial_outp(cs, UART_IER, cs->hw.elsa.IER);
274 }
275 return(ret);
276 }
277
278 static inline void
279 modem_fill(struct BCState *bcs) {
280
281 if (bcs->tx_skb) {
282 if (bcs->tx_skb->len) {
283 write_modem(bcs);
284 return;
285 } else {
286 if (test_bit(FLG_LLI_L1WAKEUP,&bcs->st->lli.flag) &&
287 (PACKET_NOACK != bcs->tx_skb->pkt_type)) {
288 u_long flags;
289 spin_lock_irqsave(&bcs->aclock, flags);
290 bcs->ackcnt += bcs->hw.hscx.count;
291 spin_unlock_irqrestore(&bcs->aclock, flags);
292 schedule_event(bcs, B_ACKPENDING);
293 }
294 dev_kfree_skb_any(bcs->tx_skb);
295 bcs->tx_skb = NULL;
296 }
297 }
298 if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
299 bcs->hw.hscx.count = 0;
300 test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
301 write_modem(bcs);
302 } else {
303 test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
304 schedule_event(bcs, B_XMTBUFREADY);
305 }
306 }
307
308 static inline void receive_chars(struct IsdnCardState *cs,
309 int *status)
310 {
311 unsigned char ch;
312 struct sk_buff *skb;
313
314 do {
315 ch = serial_in(cs, UART_RX);
316 if (cs->hw.elsa.rcvcnt >= MAX_MODEM_BUF)
317 break;
318 cs->hw.elsa.rcvbuf[cs->hw.elsa.rcvcnt++] = ch;
319 #ifdef SERIAL_DEBUG_INTR
320 printk("DR%02x:%02x...", ch, *status);
321 #endif
322 if (*status & (UART_LSR_BI | UART_LSR_PE |
323 UART_LSR_FE | UART_LSR_OE)) {
324
325 #ifdef SERIAL_DEBUG_INTR
326 printk("handling exept....");
327 #endif
328 }
329 *status = serial_inp(cs, UART_LSR);
330 } while (*status & UART_LSR_DR);
331 if (cs->hw.elsa.MFlag == 2) {
332 if (!(skb = dev_alloc_skb(cs->hw.elsa.rcvcnt)))
333 printk(KERN_WARNING "ElsaSER: receive out of memory\n");
334 else {
335 memcpy(skb_put(skb, cs->hw.elsa.rcvcnt), cs->hw.elsa.rcvbuf,
336 cs->hw.elsa.rcvcnt);
337 skb_queue_tail(& cs->hw.elsa.bcs->rqueue, skb);
338 }
339 schedule_event(cs->hw.elsa.bcs, B_RCVBUFREADY);
340 } else {
341 char tmp[128];
342 char *t = tmp;
343
344 t += sprintf(t, "modem read cnt %d", cs->hw.elsa.rcvcnt);
345 QuickHex(t, cs->hw.elsa.rcvbuf, cs->hw.elsa.rcvcnt);
346 debugl1(cs, tmp);
347 }
348 cs->hw.elsa.rcvcnt = 0;
349 }
350
351 static inline void transmit_chars(struct IsdnCardState *cs, int *intr_done)
352 {
353 int count;
354
355 debugl1(cs, "transmit_chars: p(%x) cnt(%x)", cs->hw.elsa.transp,
356 cs->hw.elsa.transcnt);
357
358 if (cs->hw.elsa.transcnt <= 0) {
359 cs->hw.elsa.IER &= ~UART_IER_THRI;
360 serial_out(cs, UART_IER, cs->hw.elsa.IER);
361 return;
362 }
363 count = 16;
364 do {
365 serial_outp(cs, UART_TX, cs->hw.elsa.transbuf[cs->hw.elsa.transp++]);
366 if (cs->hw.elsa.transp >= MAX_MODEM_BUF)
367 cs->hw.elsa.transp=0;
368 if (--cs->hw.elsa.transcnt <= 0)
369 break;
370 } while (--count > 0);
371 if ((cs->hw.elsa.transcnt < WAKEUP_CHARS) && (cs->hw.elsa.MFlag==2))
372 modem_fill(cs->hw.elsa.bcs);
373
374 #ifdef SERIAL_DEBUG_INTR
375 printk("THRE...");
376 #endif
377 if (intr_done)
378 *intr_done = 0;
379 if (cs->hw.elsa.transcnt <= 0) {
380 cs->hw.elsa.IER &= ~UART_IER_THRI;
381 serial_outp(cs, UART_IER, cs->hw.elsa.IER);
382 }
383 }
384
385
386 static void rs_interrupt_elsa(int irq, struct IsdnCardState *cs)
387 {
388 int status, iir, msr;
389 int pass_counter = 0;
390
391 #ifdef SERIAL_DEBUG_INTR
392 printk("rs_interrupt_single(%d)...", irq);
393 #endif
394
395 do {
396 status = serial_inp(cs, UART_LSR);
397 debugl1(cs,"rs LSR %02x", status);
398 #ifdef SERIAL_DEBUG_INTR
399 printk("status = %x...", status);
400 #endif
401 if (status & UART_LSR_DR)
402 receive_chars(cs, &status);
403 if (status & UART_LSR_THRE)
404 transmit_chars(cs, NULL);
405 if (pass_counter++ > RS_ISR_PASS_LIMIT) {
406 printk("rs_single loop break.\n");
407 break;
408 }
409 iir = serial_inp(cs, UART_IIR);
410 debugl1(cs,"rs IIR %02x", iir);
411 if ((iir & 0xf) == 0) {
412 msr = serial_inp(cs, UART_MSR);
413 debugl1(cs,"rs MSR %02x", msr);
414 }
415 } while (!(iir & UART_IIR_NO_INT));
416 #ifdef SERIAL_DEBUG_INTR
417 printk("end.\n");
418 #endif
419 }
420
421 extern int open_hscxstate(struct IsdnCardState *cs, struct BCState *bcs);
422 extern void modehscx(struct BCState *bcs, int mode, int bc);
423 extern void hscx_l2l1(struct PStack *st, int pr, void *arg);
424
425 static void
426 close_elsastate(struct BCState *bcs)
427 {
428 modehscx(bcs, 0, bcs->channel);
429 if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
430 if (bcs->hw.hscx.rcvbuf) {
431 if (bcs->mode != L1_MODE_MODEM)
432 kfree(bcs->hw.hscx.rcvbuf);
433 bcs->hw.hscx.rcvbuf = NULL;
434 }
435 skb_queue_purge(&bcs->rqueue);
436 skb_queue_purge(&bcs->squeue);
437 if (bcs->tx_skb) {
438 dev_kfree_skb_any(bcs->tx_skb);
439 bcs->tx_skb = NULL;
440 test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
441 }
442 }
443 }
444
445 static void
446 modem_write_cmd(struct IsdnCardState *cs, u_char *buf, int len) {
447 int count, fp;
448 u_char *msg = buf;
449
450 if (!len)
451 return;
452 if (len > (MAX_MODEM_BUF - cs->hw.elsa.transcnt)) {
453 return;
454 }
455 fp = cs->hw.elsa.transcnt + cs->hw.elsa.transp;
456 fp &= (MAX_MODEM_BUF -1);
457 count = len;
458 if (count > MAX_MODEM_BUF - fp) {
459 count = MAX_MODEM_BUF - fp;
460 memcpy(cs->hw.elsa.transbuf + fp, msg, count);
461 cs->hw.elsa.transcnt += count;
462 msg += count;
463 count = len - count;
464 fp = 0;
465 }
466 memcpy(cs->hw.elsa.transbuf + fp, msg, count);
467 cs->hw.elsa.transcnt += count;
468 if (cs->hw.elsa.transcnt &&
469 !(cs->hw.elsa.IER & UART_IER_THRI)) {
470 cs->hw.elsa.IER |= UART_IER_THRI;
471 serial_outp(cs, UART_IER, cs->hw.elsa.IER);
472 }
473 }
474
475 static void
476 modem_set_init(struct IsdnCardState *cs) {
477 int timeout;
478
479 #define RCV_DELAY 20000
480 modem_write_cmd(cs, MInit_1, strlen(MInit_1));
481 timeout = 1000;
482 while(timeout-- && cs->hw.elsa.transcnt)
483 udelay(1000);
484 debugl1(cs, "msi tout=%d", timeout);
485 udelay(RCV_DELAY);
486 modem_write_cmd(cs, MInit_2, strlen(MInit_2));
487 timeout = 1000;
488 while(timeout-- && cs->hw.elsa.transcnt)
489 udelay(1000);
490 debugl1(cs, "msi tout=%d", timeout);
491 udelay(RCV_DELAY);
492 modem_write_cmd(cs, MInit_3, strlen(MInit_3));
493 timeout = 1000;
494 while(timeout-- && cs->hw.elsa.transcnt)
495 udelay(1000);
496 debugl1(cs, "msi tout=%d", timeout);
497 udelay(RCV_DELAY);
498 modem_write_cmd(cs, MInit_4, strlen(MInit_4));
499 timeout = 1000;
500 while(timeout-- && cs->hw.elsa.transcnt)
501 udelay(1000);
502 debugl1(cs, "msi tout=%d", timeout);
503 udelay(RCV_DELAY );
504 modem_write_cmd(cs, MInit_5, strlen(MInit_5));
505 timeout = 1000;
506 while(timeout-- && cs->hw.elsa.transcnt)
507 udelay(1000);
508 debugl1(cs, "msi tout=%d", timeout);
509 udelay(RCV_DELAY);
510 modem_write_cmd(cs, MInit_6, strlen(MInit_6));
511 timeout = 1000;
512 while(timeout-- && cs->hw.elsa.transcnt)
513 udelay(1000);
514 debugl1(cs, "msi tout=%d", timeout);
515 udelay(RCV_DELAY);
516 modem_write_cmd(cs, MInit_7, strlen(MInit_7));
517 timeout = 1000;
518 while(timeout-- && cs->hw.elsa.transcnt)
519 udelay(1000);
520 debugl1(cs, "msi tout=%d", timeout);
521 udelay(RCV_DELAY);
522 }
523
524 static void
525 modem_set_dial(struct IsdnCardState *cs, int outgoing) {
526 int timeout;
527 #define RCV_DELAY 20000
528
529 modem_write_cmd(cs, MInit_speed28800, strlen(MInit_speed28800));
530 timeout = 1000;
531 while(timeout-- && cs->hw.elsa.transcnt)
532 udelay(1000);
533 debugl1(cs, "msi tout=%d", timeout);
534 udelay(RCV_DELAY);
535 if (outgoing)
536 modem_write_cmd(cs, MInit_dialout, strlen(MInit_dialout));
537 else
538 modem_write_cmd(cs, MInit_dialin, strlen(MInit_dialin));
539 timeout = 1000;
540 while(timeout-- && cs->hw.elsa.transcnt)
541 udelay(1000);
542 debugl1(cs, "msi tout=%d", timeout);
543 udelay(RCV_DELAY);
544 }
545
546 static void
547 modem_l2l1(struct PStack *st, int pr, void *arg)
548 {
549 struct BCState *bcs = st->l1.bcs;
550 struct sk_buff *skb = arg;
551 u_long flags;
552
553 if (pr == (PH_DATA | REQUEST)) {
554 spin_lock_irqsave(&bcs->cs->lock, flags);
555 if (bcs->tx_skb) {
556 skb_queue_tail(&bcs->squeue, skb);
557 } else {
558 bcs->tx_skb = skb;
559 test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
560 bcs->hw.hscx.count = 0;
561 write_modem(bcs);
562 }
563 spin_unlock_irqrestore(&bcs->cs->lock, flags);
564 } else if (pr == (PH_ACTIVATE | REQUEST)) {
565 test_and_set_bit(BC_FLG_ACTIV, &bcs->Flag);
566 st->l1.l1l2(st, PH_ACTIVATE | CONFIRM, NULL);
567 set_arcofi(bcs->cs, st->l1.bc);
568 mstartup(bcs->cs);
569 modem_set_dial(bcs->cs, test_bit(FLG_ORIG, &st->l2.flag));
570 bcs->cs->hw.elsa.MFlag=2;
571 } else if (pr == (PH_DEACTIVATE | REQUEST)) {
572 test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
573 bcs->cs->dc.isac.arcofi_bc = st->l1.bc;
574 arcofi_fsm(bcs->cs, ARCOFI_START, &ARCOFI_XOP_0);
575 interruptible_sleep_on(&bcs->cs->dc.isac.arcofi_wait);
576 bcs->cs->hw.elsa.MFlag=1;
577 } else {
578 printk(KERN_WARNING"ElsaSer: unknown pr %x\n", pr);
579 }
580 }
581
582 static int
583 setstack_elsa(struct PStack *st, struct BCState *bcs)
584 {
585
586 bcs->channel = st->l1.bc;
587 switch (st->l1.mode) {
588 case L1_MODE_HDLC:
589 case L1_MODE_TRANS:
590 if (open_hscxstate(st->l1.hardware, bcs))
591 return (-1);
592 st->l2.l2l1 = hscx_l2l1;
593 break;
594 case L1_MODE_MODEM:
595 bcs->mode = L1_MODE_MODEM;
596 if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
597 bcs->hw.hscx.rcvbuf = bcs->cs->hw.elsa.rcvbuf;
598 skb_queue_head_init(&bcs->rqueue);
599 skb_queue_head_init(&bcs->squeue);
600 }
601 bcs->tx_skb = NULL;
602 test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
603 bcs->event = 0;
604 bcs->hw.hscx.rcvidx = 0;
605 bcs->tx_cnt = 0;
606 bcs->cs->hw.elsa.bcs = bcs;
607 st->l2.l2l1 = modem_l2l1;
608 break;
609 }
610 st->l1.bcs = bcs;
611 setstack_manager(st);
612 bcs->st = st;
613 setstack_l1_B(st);
614 return (0);
615 }
616
617 static void
618 init_modem(struct IsdnCardState *cs) {
619
620 cs->bcs[0].BC_SetStack = setstack_elsa;
621 cs->bcs[1].BC_SetStack = setstack_elsa;
622 cs->bcs[0].BC_Close = close_elsastate;
623 cs->bcs[1].BC_Close = close_elsastate;
624 if (!(cs->hw.elsa.rcvbuf = kmalloc(MAX_MODEM_BUF,
625 GFP_ATOMIC))) {
626 printk(KERN_WARNING
627 "Elsa: No modem mem hw.elsa.rcvbuf\n");
628 return;
629 }
630 if (!(cs->hw.elsa.transbuf = kmalloc(MAX_MODEM_BUF,
631 GFP_ATOMIC))) {
632 printk(KERN_WARNING
633 "Elsa: No modem mem hw.elsa.transbuf\n");
634 kfree(cs->hw.elsa.rcvbuf);
635 cs->hw.elsa.rcvbuf = NULL;
636 return;
637 }
638 if (mstartup(cs)) {
639 printk(KERN_WARNING "Elsa: problem startup modem\n");
640 }
641 modem_set_init(cs);
642 }
643
644 static void
645 release_modem(struct IsdnCardState *cs) {
646
647 cs->hw.elsa.MFlag = 0;
648 if (cs->hw.elsa.transbuf) {
649 if (cs->hw.elsa.rcvbuf) {
650 mshutdown(cs);
651 kfree(cs->hw.elsa.rcvbuf);
652 cs->hw.elsa.rcvbuf = NULL;
653 }
654 kfree(cs->hw.elsa.transbuf);
655 cs->hw.elsa.transbuf = NULL;
656 }
657 }
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